Boiler Operation Engineer Interview Question - 16
Q.No-1. Can the blades of FD fan be replaced by the ID fan blades?
Ans. Yes, but the power consumption will increase and motor will be unnecessarily overloaded.
Q.No-2. What is the function of pitch control mechanism?
Ans. To vary the blade angle of FD and ID fan, in order to vary the quantity of air flow across the fan by means of hydraulic servomotor.
Q.No-3. For what purpose dampers are used and where these are located ?
Ans.
a)Dampers are used to start the FD and ID fan at no load condition
b)During maintenance to keep it is isolate condition
Q.No-4. Which economizer is best one and Why it so ?
Ans. Non steaming type economizer is the best one.
Reasons
a.) It enhance the natural circulation
b.) Effective utilization of heat carried away by the flue gas is recovered for preheating the air in RAPH
c.) Efficiency of the boiler will increase
Q.No-5. What is Natural circulation? How it takes place?
Ans. It is defined as the movement of fluid in the water wall tubes without any external pumping device.
It occurs due to difference in densities in contents of fluids in down comers from the drum and the up risers in the furnace is used to effect the movement of fluid.
Read More BOE Interview Questions
What are the factors which affect the Natural circulation ?
What is the difference between Tower type and Two pass conventional boiler?
What parameters are measured during Boiler PG test ?
Why the start up vent is used in Boilers?
List out the potential reasons for boiler tubes failure ?
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What is the circulation number in boiler ?
Most Important Steam Blowing Questions Asked In Central BOE Interview
How it is been decided that RHS or LHS safety valve of steam drum is set at higher pressure ?
Why economiser is kept at the top of the boiler ?
How do you identify the leakage of economiser tube
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